List<WebElement> oElems = driver.findElements(By.xpath("//*"));
It's not working on a HTC one with the error message
debug: Pushing command to appium work queue: ["find",{"strategy":"index paths","selector":",/0,/0/0","multiple":true}]
debug: [BOOTSTRAP] [debug] Got data from client: {"cmd":"action","action":"find","params":{"strategy":"index paths","selector":",/0,/0/0","multiple":true}}
debug: [BOOTSTRAP] [debug] Got command of type ACTION
debug: [BOOTSTRAP] [debug] Got command action: find
debug: [BOOTSTRAP] [debug] Finding ,/0,/0/0 using INDEX_PATHS with the contextId: null multiple: true
debug: [BOOTSTRAP] [debug] Returning result: {"status":13}
debug: Responding to client with error: {"status":13,"value":{"message":"An unknown server-side error occurred while processing the command."},"sessionId":"d607fe8d-a731-46b1-b22c-443ca28d7f39"}
And then it's throwing an exception back to the java.